lac·tic ac·id
noun/ˌlæktɪk ˈæsɪd/
/ˌlæktɪk ˈæsɪd/
[uncountable]- a substance that forms in milk that is no longer fresh and is also produced in the muscles during hard exercise
乳酸 - the increasingly painful build-up of lactic acid in your muscles
乳酸在肌肉中的逐渐增加让人越来越痛苦
- the increasingly painful build-up of lactic acid in your muscles